Coordinate and height accuracy

To make network accuracy values easier to describe they are grouped into successive bands called Tiers.

A new set of Orders for positions and heights was introduced to New Zealand and the Ross Sea Region in May 2010.

This page contains information on coordinate orders including the Tier and Class requirements for each.

This page contains information on height orders including the Tier and Class requirements for each.

Prior to May 2010 a different set of Orders was used to describe the accuracy of NZGD2000 and RSRGD2000 coordinates and normal-orthometric heights.

SDC status indicates the accuracy standards that the coordinates of a node comply with.